Abstract
Purpose: Evidence shows that genetic and non-genetic risk factors for breast cancer (BC) differ relative to the molecular subtype. This analysis aimed to investigate associations between epidemiological risk factors and immunohistochemical subtypes in a cohort of postmenopausal, hormone receptor-positive BC patients. Methods: The prospective, single-arm, multicenter phase IV PreFace study (Evaluation of Predictive Factors Regarding the Effectivity of Aromatase Inhibitor Therapy) included 3529 postmenopausal patients with hormone receptor-positive early BC. Data on their epidemiological risk factors were obtained from patients’ diaries and their medical histories. Data on estrogen receptor, progesterone receptor, and HER2 receptor status were obtained from pathology reports. Patients with incomplete information were excluded. Data were analyzed using conditional inference regression analysis, analysis of variance, and the chi-squared test. Results: In a cohort of 3392 patients, the strongest association with the molecular subtypes of BC was found for hormone replacement therapy (HRT) before diagnosis of early BC. The analysis showed that patients who took HRT at diagnosis had luminal A-like BC more often (83.7%) than those who had never taken HRT or had stopped taking it (75.5%). Luminal B-like BC and HER2-positive BC were diagnosed more often in women who had never taken HRT or had stopped taking it (13.3% and 11.2%, respectively) than in women who were taking HRT at diagnosis of BC (8.3% and 8.0%, respectively). Conclusions: This analysis shows an association between HRT and the distribution of molecular subtypes of BC. However, no associations between other factors (e.g., age at diagnosis, body mass index, smoking status, age at menopause, number of deliveries, age at first delivery, breastfeeding history, or family history) were noted.
| Original language | English |
|---|---|
| Journal | Breast Cancer Research and Treatment |
| Volume | 174 |
| Issue number | 2 |
| Pages (from-to) | 453-461 |
| Number of pages | 9 |
| ISSN | 0167-6806 |
| DOIs | |
| Publication status | Published - 15.04.2019 |
Funding
Conflict of interest A Hartmann received honoraria from BMS, Roche, MSD, Novartis, AstraZeneca, NanoString, and BioNTech and funding from NanoString, BioNTech, and Janssen-Cilag. MPL received honoraria from Pfizer, Roche, MSD, Hexal, Novartis, AstraZeneca, Celgene, Eisai, Medac, and Thieme for advisory boards, lectures, and travel support. WJ received research grants from Novartis. ADH participated on advisory boards for Novartis. RW participated on advisory boards for Novartis, AstraZeneca, Pfizer, and Lilly. SK participated on advisory boards for Roche/Genentech, Genomic Health, Novartis, AstraZeneca, Amgen, Celgene, SOMATEX, Daiichi Sankyo, Puma Biotechnology, pfm medical, Pfizer, and MSD Oncology and received funding from Roche and Daiichi Sankyo. CT received honoraria from Amgen, AstraZeneca, Celgene, Genomic Health, Lilly, Na- noString, Novartis, Pfizer, Puma, and Roche for lectures and advisory boards. CCH received honoraria from Roche. PG received honoraria from Novartis, Roche, and PharmaMar. NN received honoraria from Janssen-Cilag and Novartis. HCK received honoraria from Carl Zeiss Meditec, TEVA, Theraclion, Novartis, Amgen, AstraZeneca, Pfizer, Janssen-Cilag, GSK, LIV Pharma, Roche, and Genomic Health and is stock owner of Theraclion and Phaon Scientific GmbH. MW participated on advisory boards for Novartis, Roche, Pfizer, and Celgene. BR participated on advisory boards for Novartis and Roche and received funding from AstraZeneca, Chugai, Lilly, Novartis, Janssen-Cilag, and Sanofi Aventis. TF participated on advisory boards for Novartis, Roche, AstraZeneca, Pfizer, and Daiichi Sankyo. MWB’s institution received research grants from Novartis. PAF received honoraria from Novartis, Roche, Pfizer, and Amgen. CR received honoraria from Novartis, Roche, Celgene, and Eisai. All remaining authors have declared no conflicts of interest.
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 3 Good Health and Well-being
Research Areas and Centers
- Research Area: Luebeck Integrated Oncology Network (LION)
- Centers: University Cancer Center Schleswig-Holstein (UCCSH)
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